won't recrawl pages that are the same after stripping #anchor (blah.html#about, blah.html#contact, etc.)

* but broken
* committing on feature branch and will come back to this

docs/TODO.md

@@ -13,6 +13,7 @@
 * helper function to do the whole crawl process
 * document code better
   * test with godoc
+* omit fields in json when nil? (Broken, etc.)
 
 ## Features